Thanks GAB, I think that was it. I also seem to remember another page where they were multiple layers of rubber and cork. Think they may have even been blue in color too.
Mitsu, Not thinking that the raquetballs would support a washer and dryer very well.

A friend of mine bought some isolation pads like I am describing but they are made of different layers of polymer or rubber materials and paid dang near $100 for 4 of them.
Thanks for the link Scott. I'll check that one out too.